Transmission power take-off



J. R. HICKS April 22, 1930.

TRANSMI S S ION POWER TAKE- OFF Filed Sept. 14, 1928 2 Sheets-Sheet l INVENTOR. W 1?. fi/c/rs ATTORNEY April 22, 1930. J R, HICKS TRANSMISSION POWER TAKE-OFF Filed Sept. 14, 1928 2 Sheets-Sheet 2 INVEzYTOP. Jon /7/ aka A TTORNEZ/ Wxy MN Q I Q 7 m w \w 4 k 44!}? w b Q m I I, v M R i Q Q Ni Q a Q \wmh ntk i Q w 7 v a RV Q \N m 1 m k iii? 1 iillxlia 1i i ff: Ii. H [II Q NM k fix N 3 Patented Apr. 22, 1930 UNITED [.s'raras PATENT OFFICE.

JOHN B. HICKS, OI OKLAHOMA, ABSIG-NOR F 'THREE-FOUBTHS '10 TIDAL OIlL COMPANY, OF TULSA, OKLAHOMA, A CORPORATION 01 OKLAHOMA TRANSMISSION POWER TAKE-OFF My invention relatesto power-transmitting apparatus and more articularly to power take-off mechanism, e principal ob ectof my invention. being to providea device of this character whereby power from a truck motor or the like maybe utilized for driving apparatus such as a winch or pump mounted on the truck chassis.

A further object of my invention'is to pro- Vide such a device that may be" operated independently of or simultaneously with the driving wheels, or permit a direct drive from the transmission to the rear wheels.

Another'object' of the invention isto provide'a mechanism so designed that it may be interposed between the transmission and rear wheels for transmitting power to the driven apparatus through the. same selective gear ratios used for driving the truck.

In accomplishing these and other ob ects of my invention I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a perspective view of a power takeoff embodyin the invention on atruck chassis and opera 1y connected to a driven apparatus.

Fig.2 is a central vertical sectional view illustrating the manner. of interposingthe power take-off between the transmission and universal joint of a truck. d I Fig.3 is a vertical cross section on the line 3-'3, Fig. 2. 1 Fig. 4 is a detail perspective view of a coupling flange such as used for connecting ends of the drive shafts.

Fig. 5 is a vertical cross-section on the line 5-5, Fig. 2. A

Fig. 6 is a disassembled view in perspective of a driving sprocket and cooperating clutch member.

Referring in detail to the drawings:

.1 designates a truck chassis having longitudinal frame members 2, connected and braced by cross-members 3, and 4 a transmis sion for selectively delivering power from the motor through a propeller shaft 5 and universal joint 6 to the differential and rear wheels.

The power take-off unit includes a cylindrica lfhousing 7 rovided at its front and rear ends with soc ets 8 and 9, respectively, for seating bearings 10 and 11 carrying independent rive shaft sections 12 and 13, the drive shaft 12 comprising a relatively long smooth portion 14 terminating in a tapered end 15 having a reduced threaded portion 16. Thesplincd rear end 17 of the shaft 12 is provided with a cylindrical socket 18 seating a sleeve 19 preferably of hardened material for receivin a reduced bearing end 20 of the shaft13. 'ihe smooth rear end 21 of the shaft 13 is tapered as at 22 terminating in a threaded shank 23. The portion 24 of the shaft 13 between the bearing end 20 and rear end 21 is splined complementary to the splined end 17 of the shaft 12.

It is apparent that with the shaft sections 12 and 13 mounted in the bearings 10 and 11 the bearin end 20 permanently engages the sleeve 19 thereby maintaining the shafts in accurate alignment, yet permitting rotation of onesection independently of the other.

v To provide space for a shifting mechanism the housing 7 is cast with a relativel wide cylindrical recess 25 near its rear end aving an upper open mouth 26. A central bore 7 in the housing, equal to the diameter of the bearin sockets 8 and extending forwardly from t e recess. 25 seats a cylindrical sleeve 27 preferably of hard metal for slidably receiving a shifting sleeve 28 having a splined axial bore 29 complementary to the splined portions of the shafts 12 and 13.

Formed on'the rear end of the shifting sleeve is a flange 30 having an annular groove 31 engaging a shifting yoke 32 fixed to a shiftingrod 33 slidable in a bore 34, parallel to, and spaced above, the. shaft sections. Threaded in the rear end of the housing immediately above the rod 33 is a lock 35 including a spring urged ball 36 adapted to selectively engage-one ofa pair of spaced notches 37 and 38 in the upper edge of the rod. From Fig. 2 it will be apparent that b sliding the rod 33 forwardly until the shi lock 35 engages the notch 38 the shifting sleeve 28 cooperating with the rodth-rough the yoke 32 will also move forwardly engaging both aligning with t e apertures 65 in t sprocket 48, rotatably sup by a bearin 49, seating in a rear socket 50 gral shaft. When, however, the sleeve is moved back to the. position illustrated, the shaft sections are free to rotate independently of each other. i

The open mouth 26 is of suflicient width to permit mounting of the shifting yoke on the rod 33 and is normall closed by a cover 39,

attached to the housing by means such as screws 40.

4 End plates 41-and 42 are attached to the housing by counter-sunk screws 43 and central bores 44 are provided with annular recesses 45 for receiving oil retainin rings 46.-

An aperture 47 in the end plate 41 a igns with the bore 34, the rod 33 extending through the aperture for attaching actuating means later described.

The smooth portion 14 of the shaft section 12 extends sufiiciently from the forward end of the power take-off housing to carry a clutch and driving assembly,

ported on the shaft of the s roc et. An oil retaining disk 51 and cover p (ass 53 are attached to the sprocket by screws Extending into sprocket .to near the bearing socket "is a: cylindrical recess 55 provided with forwardprojecting clutch jaws 56. A mating 1v clutch member 57, having key-seats 58, is slid mounted on the shaft portion 14, longiabl tu inal keys 59 fixed ou the key-seats 58 to prev clutch member. Rearwardly projecting jaws 60 adapted tocooperate with the jaws 56 are provided on the member 57 and an annular roove 61 in the member; receives a clutch ork 62 for moving the jaws 60 into and out of enga ement with the .'aws 56.

In or' er to interpose t e .p'owerjtakeofi unit between the transmission and universal joint, a section of the ropeller shaft corresponding in length to-t e take-off is removed and provided with tapered ends like the ends 15 and 22 previously described. H Coupling members 63 (Fig. 4 having annular facing flanges 64'prov1de with apertures65, are keyed to the. tapered ends of the shaft and castellated nuts66. and lock washers 67 on the reduced threaded portions of the shafts secure the'flanges to the tapered shaft ends. Annular spacing collars 68 provided with central openin s 69 and spaced, a ertures 70 e coupling members are interposed betweenthe -facing flanges 64, bolts 71 extendingthrough the the shaft engaging -aligning o nings securely mounting the parts toget er. As illustratedfijone of a .pair

- of coupling members isprovided with'smooth apertures and the other. with threaded opena ings for engaging the threads on the bolts 71.

of the splined portions of the shaft f including a ate 52 mounted in a counter-sunk re the forward end of the,

nt rotation of the splined portion 17 there menses Additional means for rigidly supporting the power take-ofi housing and retaining it in proper alignment with the other units of the chassis comprise an intermediate crossmember 7 2, supported from,

V v and secured to the longitudinal ,frame members 2, by bolts 7An arcuate saddle portion 7 40f the cross member engages the lower surface of takeofi housing and is fixed thereto by means such as bolts 75. 4

With the cylindrical housing 7 installed in the chassis, means. are provided for conveniently operating the clutch mechanism therein from 3 to one side of which is pivotally mounted a 1 shifting lever 77. An actuating rod 78 attached thereto by a yoke 79 exten rearwardly of the lever and is attached b a yoke 80 to an upstanding post 81 threa ed into the rear end of the shiftingrod 33. Pivotally mounted on the bracket 6 opposite the lever '77 is an operating lever 82 provided with a yoke 83 having elongatedopehings'S, a rod 85 keyed to the clutc fork 62 being pivotally mounted between the yoke 83 on a. pin 86 The sprocket 48 may apparatus mounted on the truck bed. 1 With the mechanism positioned as illus- -trated in Fig. 2, with the clutch jaws 56 enthree forward or one reverse gear ratios com iii the drivers seat, includin .a' bracket 76. fixed to the forward cross-mam er be operably connected by a chain belt 87 to a winch 88 or other driven monly provided, could be selected. However, i

with the splined sleeve. 28 moved rearwardly to its limit, the shaft 12 is free to turn independently of the shaft 13v thus preventing transmission of power to the rear or driving wheels. "Forward movement of the lever 82 disengages the clutch jaws, thereby causing a cessation of power'to the sprocket and ump.

' Forward movementof the lever 77 sli es the splined sleeve into en gement with the y efie'cting an integral shaft and ;a direct drive to the rear wheels. Should'it be desirable to drive the winch during travel of the truck, the clutch jaws are again engaged and power is transmitted simultaneously to both the winch and driving wheels.

What I claim and desire to secure by La- Y ters Patent is:

1. In a device of the character described a housing, shaft sections journaled in and projectingJ from the housing, a driving member rotata ly mounted on the projecting end of a shaft section andhaving clutch jaws, means for selectively. efiectingan integral or indendent relation ofthe shaft sections, a mat mg clutch memberkeyed a ainst rotation but slidably mounted, on the ftsection adjacent the driving member, and means for engaging or disengaging the driving member and matin clutch member.

2. In a evice of the character described a housing, shaft sections journaled in and pro jecting from the housing, including means for retaining linear relation of the shafts, splined portions on the shaft, a splined sleeve slidable on the splined portions for selectively eflecting an integral or independent relation 10 of the shaft sections, a driving sprocketrotatably mounted on the projecting end of a shaft section and having clutch jaws, a cooperating clutch member keyed against rotation but slidably mounted on the shaft section adjacent the driving sprocket and means for engaging or disengaging the driving sprocket and cooperating clutch member.

3. In a device of the character described a housing, shaft sections journaled in and projecting from the housing, including means for retaining linear relation of the shafts, splined portions on the shaft, a s lined sleeve slidable on the splined portions or selectively effecting an integral or independent relation of the shaft sections, means for sliding the sleeve and locking it in selected position, a driving sprocket rotatably mounted on the projecting end of a shaft section and having clutch jaws, a cooperating clutch member keyed against rotation but slidably mounted v on the shaft section adjacent the driving sprocket and means for engaging or disengaging the driving sprocket and cooperating clutch member. In testimony whereof I aflix my signature.

JOHN R. HICKS. 

